ATLANTIC CITY, N.J. — Students at a New Jersey high school have learned not to mess with the lunch ladies.

Cafeteria workers at Atlantic City High School served only cheese sandwiches Wednesday and Thursday as punishment for a cell-phone-coordinated food fight.

School superintendent Fredrick Nickles says the school supplies only the basic food requirement when there’s been a food-throwing incident. Nickles says the policy is effective.

A parent, Bridgitte Reid, became angry after her daughter explained the menu. Reid called it “prison food.”

Students are getting a regular menu on Friday.